./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-numeric/TwoWay.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-numeric/TwoWay.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6e96af222dc7427442f09a30ad05a811063c14ee1b704442df6b3bb77339a035 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:25:38,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:25:38,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:25:38,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:25:38,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:25:38,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:25:38,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:25:38,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:25:38,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:25:38,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:25:38,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:25:38,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:25:38,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:25:38,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:25:38,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:25:38,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:25:38,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:25:38,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:25:38,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:25:38,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:25:38,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:25:38,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:25:38,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:25:38,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:25:38,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:25:38,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:25:38,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:25:38,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:25:38,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:25:38,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:25:38,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:25:38,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:25:38,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:25:38,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:25:38,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:25:38,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:25:38,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:25:38,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:25:38,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:25:38,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:25:38,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:25:38,991 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-22 14:25:39,015 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:25:39,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:25:39,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:25:39,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:25:39,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:25:39,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:25:39,018 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:25:39,018 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-22 14:25:39,018 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-22 14:25:39,019 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-22 14:25:39,019 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-22 14:25:39,019 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-22 14:25:39,019 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-22 14:25:39,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:25:39,020 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 14:25:39,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:25:39,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:25:39,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-22 14:25:39,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-22 14:25:39,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-22 14:25:39,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:25:39,021 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-22 14:25:39,021 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:25:39,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-22 14:25:39,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:25:39,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:25:39,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:25:39,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:25:39,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:25:39,024 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-22 14:25:39,024 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e96af222dc7427442f09a30ad05a811063c14ee1b704442df6b3bb77339a035 [2021-11-22 14:25:39,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:25:39,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:25:39,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:25:39,322 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:25:39,323 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:25:39,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/termination-numeric/TwoWay.c [2021-11-22 14:25:39,382 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/data/cdfe471ea/9b17cf29268b42a8b35a6e7c77982ea5/FLAG095930732 [2021-11-22 14:25:39,773 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:25:39,774 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/sv-benchmarks/c/termination-numeric/TwoWay.c [2021-11-22 14:25:39,780 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/data/cdfe471ea/9b17cf29268b42a8b35a6e7c77982ea5/FLAG095930732 [2021-11-22 14:25:40,190 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/data/cdfe471ea/9b17cf29268b42a8b35a6e7c77982ea5 [2021-11-22 14:25:40,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:25:40,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:25:40,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:25:40,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:25:40,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:25:40,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:25:40" (1/1) ... [2021-11-22 14:25:40,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a9b389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:25:40, skipping insertion in model container [2021-11-22 14:25:40,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:25:40" (1/1) ... [2021-11-22 14:25:40,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:25:40,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:25:40,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:25:40,406 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:25:40,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:25:40,429 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:25:40,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:25:40 WrapperNode [2021-11-22 14:25:40,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:25:40,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:25:40,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:25:40,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:25:40,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:25:40" (1/1) ... [2021-11-22 14:25:40,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:25:40" (1/1) ... [2021-11-22 14:25:40,461 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 16 [2021-11-22 14:25:40,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:25:40,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:25:40,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:25:40,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:25:40,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:25:40" (1/1) ... [2021-11-22 14:25:40,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:25:40" (1/1) ... [2021-11-22 14:25:40,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:25:40" (1/1) ... [2021-11-22 14:25:40,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:25:40" (1/1) ... [2021-11-22 14:25:40,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:25:40" (1/1) ... [2021-11-22 14:25:40,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:25:40" (1/1) ... [2021-11-22 14:25:40,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:25:40" (1/1) ... [2021-11-22 14:25:40,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:25:40,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:25:40,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:25:40,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:25:40,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:25:40" (1/1) ... [2021-11-22 14:25:40,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:40,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:40,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:40,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-22 14:25:40,567 INFO L130 BoogieDeclarations]: Found specification of procedure twoWay [2021-11-22 14:25:40,567 INFO L138 BoogieDeclarations]: Found implementation of procedure twoWay [2021-11-22 14:25:40,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:25:40,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:25:40,629 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:25:40,630 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:25:40,762 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:25:40,775 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:25:40,776 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-22 14:25:40,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:25:40 BoogieIcfgContainer [2021-11-22 14:25:40,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:25:40,780 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-22 14:25:40,781 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-22 14:25:40,785 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-22 14:25:40,785 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-22 14:25:40,786 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.11 02:25:40" (1/3) ... [2021-11-22 14:25:40,787 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5fd42667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.11 02:25:40, skipping insertion in model container [2021-11-22 14:25:40,788 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-22 14:25:40,788 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:25:40" (2/3) ... [2021-11-22 14:25:40,789 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5fd42667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.11 02:25:40, skipping insertion in model container [2021-11-22 14:25:40,789 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-22 14:25:40,789 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:25:40" (3/3) ... [2021-11-22 14:25:40,791 INFO L388 chiAutomizerObserver]: Analyzing ICFG TwoWay.c [2021-11-22 14:25:40,852 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-22 14:25:40,853 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-22 14:25:40,853 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-22 14:25:40,853 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-22 14:25:40,853 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-22 14:25:40,853 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-22 14:25:40,854 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-22 14:25:40,854 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-22 14:25:40,871 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-22 14:25:40,901 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-22 14:25:40,901 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-22 14:25:40,901 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-22 14:25:40,908 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-11-22 14:25:40,908 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-11-22 14:25:40,909 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-22 14:25:40,909 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-22 14:25:40,913 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-22 14:25:40,913 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-22 14:25:40,914 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-22 14:25:40,914 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-11-22 14:25:40,915 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-11-22 14:25:40,923 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1, main_~y~0#1, main_~z~0#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1; 9#L42true assume !(main_~x~0#1 < 0);main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 14#L45true assume !(main_~y~0#1 < 0);main_~z~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 16#L48true call main_#t~ret6#1 := twoWay(1, main_~x~0#1);< 5#twoWayENTRYtrue [2021-11-22 14:25:40,923 INFO L793 eck$LassoCheckResult]: Loop: 5#twoWayENTRYtrue ~terminate := #in~terminate;~n := #in~n; 12#L27true assume !(~n < 0);~m~0 := ~n; 13#L31true assume 0 != ~terminate;#t~post0 := ~m~0;~m~0 := #t~post0 - 1;havoc #t~post0; 8#L31-2true call #t~ret2 := twoWay(~terminate, ~m~0);< 5#twoWayENTRYtrue [2021-11-22 14:25:40,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:25:40,933 INFO L85 PathProgramCache]: Analyzing trace with hash 42056122, now seen corresponding path program 1 times [2021-11-22 14:25:40,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:25:40,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668883487] [2021-11-22 14:25:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:25:40,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:25:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:25:41,033 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 14:25:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:25:41,072 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 14:25:41,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:25:41,079 INFO L85 PathProgramCache]: Analyzing trace with hash 927614, now seen corresponding path program 1 times [2021-11-22 14:25:41,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:25:41,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930126208] [2021-11-22 14:25:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:25:41,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:25:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:25:41,108 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 14:25:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:25:41,130 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 14:25:41,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:25:41,134 INFO L85 PathProgramCache]: Analyzing trace with hash 322591927, now seen corresponding path program 1 times [2021-11-22 14:25:41,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:25:41,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23147057] [2021-11-22 14:25:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:25:41,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:25:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:25:41,160 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 14:25:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:25:41,183 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 14:25:41,453 INFO L210 LassoAnalysis]: Preferences: [2021-11-22 14:25:41,454 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-22 14:25:41,454 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-22 14:25:41,454 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-22 14:25:41,454 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-22 14:25:41,454 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:41,454 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-22 14:25:41,454 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-22 14:25:41,455 INFO L133 ssoRankerPreferences]: Filename of dumped script: TwoWay.c_Iteration1_Loop [2021-11-22 14:25:41,455 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-22 14:25:41,455 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-22 14:25:41,471 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,491 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,508 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,511 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,514 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,610 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-22 14:25:41,611 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-22 14:25:41,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:41,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:41,630 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:41,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-11-22 14:25:41,634 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 14:25:41,635 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 14:25:41,661 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 14:25:41,661 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#t~ret2=0} Honda state: {twoWay_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 14:25:41,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:41,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:41,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:41,684 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:41,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-11-22 14:25:41,692 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 14:25:41,692 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 14:25:41,702 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 14:25:41,703 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_~m~0=0} Honda state: {twoWay_~m~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 14:25:41,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:41,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:41,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:41,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:41,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-11-22 14:25:41,739 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 14:25:41,740 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 14:25:41,748 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 14:25:41,748 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#res=0} Honda state: {twoWay_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 14:25:41,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:41,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:41,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:41,773 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:41,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-11-22 14:25:41,775 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 14:25:41,776 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 14:25:41,794 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 14:25:41,794 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_~n=0} Honda state: {twoWay_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 14:25:41,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-11-22 14:25:41,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:41,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:41,823 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:41,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-11-22 14:25:41,835 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 14:25:41,835 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 14:25:41,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:41,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:41,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:41,867 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:41,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-11-22 14:25:41,872 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-22 14:25:41,873 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 14:25:41,921 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-22 14:25:41,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:41,927 INFO L210 LassoAnalysis]: Preferences: [2021-11-22 14:25:41,927 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-22 14:25:41,927 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-22 14:25:41,927 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-22 14:25:41,927 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-22 14:25:41,927 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:41,927 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-22 14:25:41,927 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-22 14:25:41,927 INFO L133 ssoRankerPreferences]: Filename of dumped script: TwoWay.c_Iteration1_Loop [2021-11-22 14:25:41,927 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-22 14:25:41,928 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-22 14:25:41,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,933 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,937 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,943 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,946 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,982 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,984 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:41,986 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:42,060 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-22 14:25:42,065 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-22 14:25:42,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:42,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:42,074 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:42,076 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 14:25:42,086 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 14:25:42,086 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-22 14:25:42,087 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 14:25:42,087 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 14:25:42,087 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 14:25:42,090 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-22 14:25:42,090 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-22 14:25:42,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-11-22 14:25:42,101 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-22 14:25:42,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:42,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:42,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:42,142 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:42,148 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 14:25:42,157 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 14:25:42,157 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-22 14:25:42,157 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 14:25:42,157 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 14:25:42,157 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 14:25:42,158 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-22 14:25:42,159 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-22 14:25:42,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-11-22 14:25:42,169 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-22 14:25:42,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:42,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:42,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:42,194 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:42,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-11-22 14:25:42,202 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 14:25:42,209 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 14:25:42,210 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-22 14:25:42,210 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 14:25:42,210 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 14:25:42,210 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 14:25:42,211 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-22 14:25:42,212 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-22 14:25:42,217 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-22 14:25:42,220 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-22 14:25:42,220 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-22 14:25:42,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:42,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:42,250 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:42,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-11-22 14:25:42,251 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-22 14:25:42,251 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-22 14:25:42,251 INFO L513 LassoAnalysis]: Proved termination. [2021-11-22 14:25:42,252 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(twoWay_#in~n) = 2*twoWay_#in~n + 1 Supporting invariants [] [2021-11-22 14:25:42,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:42,274 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-22 14:25:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:25:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:25:42,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 14:25:42,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:25:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:25:42,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 14:25:42,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:25:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:25:42,531 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2021-11-22 14:25:42,533 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:25:42,713 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2). Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 45 states and 57 transitions. Complement of second has 16 states. [2021-11-22 14:25:42,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-11-22 14:25:42,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:25:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 16 transitions. [2021-11-22 14:25:42,726 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 5 letters. Loop has 4 letters. [2021-11-22 14:25:42,729 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 14:25:42,729 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 9 letters. Loop has 4 letters. [2021-11-22 14:25:42,730 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 14:25:42,730 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 5 letters. Loop has 8 letters. [2021-11-22 14:25:42,731 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 14:25:42,731 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 57 transitions. [2021-11-22 14:25:42,744 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-22 14:25:42,781 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 23 states and 26 transitions. [2021-11-22 14:25:42,782 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2021-11-22 14:25:42,783 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-11-22 14:25:42,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 26 transitions. [2021-11-22 14:25:42,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-22 14:25:42,788 INFO L681 BuchiCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-22 14:25:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 26 transitions. [2021-11-22 14:25:42,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2021-11-22 14:25:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:25:42,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-22 14:25:42,826 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-22 14:25:42,826 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-22 14:25:42,826 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-11-22 14:25:42,835 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 19 transitions. [2021-11-22 14:25:42,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:42,841 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-22 14:25:42,841 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-22 14:25:42,841 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-22 14:25:42,842 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:25:42,842 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-11-22 14:25:42,842 INFO L791 eck$LassoCheckResult]: Stem: 130#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 131#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet3#1, main_#t~nondet4#1, main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1, main_~y~0#1, main_~z~0#1;main_~x~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1; 143#L42 assume !(main_~x~0#1 < 0);main_~y~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 142#L45 assume !(main_~y~0#1 < 0);main_~z~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 140#L48 call main_#t~ret6#1 := twoWay(1, main_~x~0#1);< 144#twoWayENTRY ~terminate := #in~terminate;~n := #in~n; 138#L27 assume !(~n < 0);~m~0 := ~n; 139#L31 assume !(0 != ~terminate);#t~post1 := ~m~0;~m~0 := 1 + #t~post1;havoc #t~post1; 133#L31-2 [2021-11-22 14:25:42,842 INFO L793 eck$LassoCheckResult]: Loop: 133#L31-2 call #t~ret2 := twoWay(~terminate, ~m~0);< 132#twoWayENTRY ~terminate := #in~terminate;~n := #in~n; 134#L27 assume !(~n < 0);~m~0 := ~n; 145#L31 assume 0 != ~terminate;#t~post0 := ~m~0;~m~0 := #t~post0 - 1;havoc #t~post0; 133#L31-2 [2021-11-22 14:25:42,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:25:42,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1236519797, now seen corresponding path program 1 times [2021-11-22 14:25:42,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:25:42,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627400617] [2021-11-22 14:25:42,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:25:42,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:25:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:25:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:25:42,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:25:42,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627400617] [2021-11-22 14:25:42,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627400617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:25:42,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:25:42,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:25:42,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595245224] [2021-11-22 14:25:42,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:25:42,911 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-11-22 14:25:42,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:25:42,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1876964, now seen corresponding path program 2 times [2021-11-22 14:25:42,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:25:42,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471046955] [2021-11-22 14:25:42,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:25:42,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:25:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:25:42,921 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 14:25:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:25:42,935 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 14:25:43,092 INFO L210 LassoAnalysis]: Preferences: [2021-11-22 14:25:43,093 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-22 14:25:43,093 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-22 14:25:43,093 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-22 14:25:43,093 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-22 14:25:43,093 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:43,093 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-22 14:25:43,093 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-22 14:25:43,094 INFO L133 ssoRankerPreferences]: Filename of dumped script: TwoWay.c_Iteration2_Loop [2021-11-22 14:25:43,094 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-22 14:25:43,094 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-22 14:25:43,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:43,107 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:43,109 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:43,112 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:43,114 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:43,122 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 14:25:43,216 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-22 14:25:43,217 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-22 14:25:43,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:43,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:43,222 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:43,228 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 14:25:43,228 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 14:25:43,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-11-22 14:25:43,250 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 14:25:43,250 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#t~ret2=0} Honda state: {twoWay_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 14:25:43,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:43,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:43,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:43,285 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:43,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-11-22 14:25:43,287 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 14:25:43,287 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 14:25:43,295 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 14:25:43,296 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#t~post0=0} Honda state: {twoWay_#t~post0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 14:25:43,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:43,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:43,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:43,329 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:43,331 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 14:25:43,331 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 14:25:43,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-11-22 14:25:43,350 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 14:25:43,350 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#t~post1=0} Honda state: {twoWay_#t~post1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 14:25:43,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:43,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:43,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:43,387 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:43,390 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 14:25:43,390 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 14:25:43,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-11-22 14:25:43,414 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 14:25:43,414 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#res=0} Honda state: {twoWay_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 14:25:43,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:43,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:43,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:43,452 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:43,458 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 14:25:43,458 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 14:25:43,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-11-22 14:25:43,481 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 14:25:43,481 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#in~terminate=-8, twoWay_~terminate=-8} Honda state: {twoWay_#in~terminate=-8, twoWay_~terminate=-8} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 14:25:43,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:43,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:43,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:43,511 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:43,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-11-22 14:25:43,513 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 14:25:43,514 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 14:25:43,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-11-22 14:25:43,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 14:25:43,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:25:43,555 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 14:25:43,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d65ed82-67ea-4940-bfb0-d8c6a1818a55/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-11-22 14:25:43,558 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-22 14:25:43,558 INFO L160 nArgumentSynthesizer]: Using integer mode.